Having already taken a look at the XFX card I had a good idea of what to expect going into the testing on the Sapphire card. They are both overclocked cards with aftermarket coolers and the HD 7770 as a whole is a very cool card. Running through the FurMark benchmark gave us a slightly higher temperature than the dual fan’ed XFX card but noise performance was exactly the same, silent. I was expecting the single fan card to have to run at a little higher RPM to keep everything cool but the Sapphire HD 7770 OC did a great job keeping the card cool while running at a noise level that can only be described as silent.